As part of Road Trip 2015, CNET visits Mcity, a 32-acre fake city in Michigan designed to test self-driving cars' navigation and communication abilities -- and to keep research from migrating to Silicon Valley.

CNET editor Dong Ngo shows you a quick way to roll back to your previous version of Windows if you just completed an in-place upgrade to Windows 10. You have 30 days from the time of the upgrade to do this.